Resinous dibasic carboxylic acid salts of a guanidine as mothproofers



Patented Oct. 22, 1946 RESINOUS DIBASIC GARBOXYLIC ACID SALTS OF A GUANIDINE AS MOTHPROOFERS Vartkes Migrdichian, Greenwich, Conn.,assignor to American Cyanamid Company, New York, N. Y., a corporation of Maine No Drawing.

Application Februaryfi, 1940,

Serial No. 317,173

13 Claims. 1

The present invention relates to salts of dibasic carboxylic acids containing a guanidine group, which are resinous or non-crystalline in character, useful as mothprooflng agents.

There'is on the market today, a mothproofing composition, the active ingredient of which is dixylyl guanidine oleate dissolved in petroleum naphtha. The fact that cloth treated with a heavy dose of the above composition acquires a greasy feel is objectionable.

The principal object of the preesnt invention,

therefore, is to provide a guanidine or substituted guanidine salt suitably soluble for application to fabric which will effectively protect such cloth against the ravages of the carpet beetle and/r webbing clothes moth larvae without taking on this objectionable feel, even in heavy dosages.

It has been discovered that salts of guanidines or substituted guanidines may be obtained by reacting the free guanidine or substituted guanidine with dibasic carboxylic acids. A large number of these compounds have been prepared and the very remarkable discovery made that all of these salts, with the exception of the oxalate, are of a resinous character. This is a desirable characteristic in a substance used for mothproofing in that it has a tendency to adhere to the fabric when deposited thereon from its solutions. In the case of crystalline material such as the oxalate, the deposited crystals of the salt may be brushed or rubbed therefrom with consequent loss of mothproofing characteristics.

While the dixylyl guanidine salt of a dibasic carboxylic acid is preferred, yet other mono or poly substituted guanidine salts thereof are useful, such as those of the alkyl, arid and alkyl aryl groups, as well as the unsubstituted guanidine salts. Any dibasic carboxylic acid except oxalic may be used, such as malonic, succinic, glutaric, adipic, pimelic, suberic, azelaic, sebacic or the like.

These compounds may be readily prepared by dissolving the acid in alcohol, adding the equivalent quantity of the free guanidine or substituted guanidine and evaporating oi the excess alcohol. They may also be made by adding equivalent quantities of the guanidine or guanidine compound to the molten acid.

These guanidine and substituted guanidine salts are fusible, so that an alternative convenient method of preparing them is to add a mixture in equivalent quantities of the acid and the free cuanidine or substituted s'uanidine to the fused guanidine salt, heating until all solid disappears,

whereupon combination to the salt takes place almost instantaneously.

Still another method which avoids the necessity of evaporating off large quantities of alcohol, is to dissolve a small portion of the mixture of the acid and free or substituted guanidine in warmalcohol and adding more of the mixture while the alcohol.

liquid is kept-hot. Proceeding in this manner and starting with a comparatively small quantity of alcohol, any amount of the corresponding salt containing the guanidine group may be prepared. The small amount of alcohol in the final product is not objectionable and may be eliminated if so desired by grinding the chilled product and drying in the usual manner.

These compounds are not soluble to any great extent in petroleum fractions but are to a limited extent in chlorinated hydrocarbons and in arcmatic hydrocarbons. They are quite soluble in The solubility of these compounds in petroleum hydrocarbons may be increased by the addition of alcohol. To the alcoholic solutions thereof, large roportions of carbon tetrachloride v thirty pounds of cloth, or the cloth may be dipped in the solution, wrung out and then dried.

A medium weight white wool flannel, a brown wool cloth and a woolen suiting were used .in a series of tests with salts of the above acids containing a. guanidine group, with the exception of the oxalate, which was unsuitable because of its crystalline nature. The compounds were applied in solution in a mixed alcohol-carbon tetrachloride solvent at various rates and the resistance of the treated pieces to the attack of black carpet beetle and webbing clothes moth larvae tested. -All solutions contained a quantity of the guanidine salt equivalent to approximately 3%. All samples of cloth which had had an application equivalent to as much as one gallon per ten pounds of cloth had complete protection. This resistance to destruction by the above insects was ineffective only when the application dropped to one-third of a gallon per ten pounds of cloth.

Many of the above substances are new chemical compounds.

3 While the invention has been described with particular reference to specific embodiments, it is to be understood that it is not to be limited thereto but is to be construedbroadly and restricted soley by the scope of the appendedclaims;

I claim: g t

1. A mothproofing composition containing a dixylyl guanidine sebacate, the salt having resins ous properties.

2. A mothproofing composition containing a dixylyl guanidinesaltof malonic acid, the salt having resinous properties.

3. A mothproofing composition containing a dixylyl guanidine salt of succinic acid, the salt having resinous properties. 4

4. A method of mothproofing which includes the step of contacting the material to be mothprooied with a composition containing a guanidine salt of a dibasic carboxylic acid, the salt having resinous properties. 5. A method of mothproofing which includes the step of contacting the material to be mothproofed with a composition containing-a substituted guanidine salt of a dibasic carboxylic acid, the salt having resinous properties. 7

6. A method of mothproofing which includes the step of contacting the material to be mothproofed with a composition containing a, disubstituted guanidine salt of a dibasic carboxylic acid, the salt having resinous properties.

7. A method of mothproofing which includes the step of contacting the material to be mothproofed with a composition containing a diaryl substituted guanidinesalt of a dibasic carboxylic acid, the salt having resinous properties.

, 8. A method of mothprooflng which includes the step of contacting the material to be mothproofed with a composition containing a dixylyl guanidine salt of a dibasic carboxyiic acid, the salt having resinous properties.

9. A method of mothproofing which includes the step of contacting the material to be mothproofed with a composition containing a dixylyl guanidine sebacate, the salt having resinous properties.

'10. A method of mothproofing which includes the step of contacting the material to be mothproofed with a composition containing, a guanidine salt of malonic acid, the salt having resinous properties.

11. A method of mothproofing which includes the step oi? contacting the material to be mothproofed with a composition containing a dixylylguanidine salt of malonic acid. the salt having resinous properties.

12. A method of mothproofing which includes the step of contacting the material to be mothproofed with a composition containing a guanidine salt of succinic acid, the salt having resinous properties.

13. A method of mothproofing which includes the step of contacting the material to be mothproofed with a composition containing a dixylyl guam'dine salt of succinic acid, the salt having resinous properties.

, VARTKES MIGRDICHIAN. 

